A Novel High Step-Up Three-Port Converter

• Main Authors: Po-HsinTseng, 曾博新
• Other Authors: Jiann-Fuh Chen
• Format: Others
• Language: en_US
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/28159826897787961934

碩士 === 國立成功大學 === 系統及船舶機電工程學系 === 102 === This thesis proposed a novel high step-up three port converter. The key concepts of the proposed converter are combined coupled-inductor technique, voltage lift technique and multi-winding technique of coupled-inductor. However, the using of the coupled-inductor induce serious voltage spike on power switches during the turned-off period. Therefore, for suppressing and recycling the energy that suffer from leakage energy, the passive snubber technique is applied. By adjusting the turns ratio and sufficient duty ratio of power switches. Also, each port of low voltage can achieve high voltage conversion ratio simultaneously. Operational principals, Boundary conduction mode analysis, steady state analysis, design process and control strategies of the proposed converter are presented and discussed. Finally, the prototype of the proposed converter with 250 W full-load, a low voltage input port(36 V~24 V) for Fuel Cell (FC) source, a bidirectional port for storage portions (48 V), and a high voltage port(400 V) for output is implemented to verify the theoretical analysis. The control strategies of the proposed converter is realized by a digital signal processor (DSP) controller.